Upper Blackwelder Dam
Significant HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | California |
| County | Yuba |
| Nearest City | BEALE AFB |
| River/Stream | HUTCHINSON CREEK |
| Coordinates | 39.15833, -121.38333 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 19 ft |
| Dam Height | 14 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 330 acre-ft |
| Max Storage | 330 acre-ft |
| Normal Storage | 80 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 482 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | USAF ACC |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 07/18/2022 |
| Emergency Action Plan | Yes |